package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JWTUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private RedisTemplate<String,String> redisTemplate ;

    @Autowired
    private SystemUserService systemUserService ;

    @Override
    public CaptchaVo createCaptchaVo() {
        //1.生成验证码图片
        SpecCaptcha specCaptcha = new SpecCaptcha(130,48,4);
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);

        //2.取出验证码图片中的验证码内容
        String code = specCaptcha.text().toLowerCase();
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString() ;
        String img = specCaptcha.toBase64() ;

        //3.保存到redis中，有效时长60秒
        redisTemplate.opsForValue().set(key,code,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC*60, TimeUnit.SECONDS);

        //4.返回
        return new CaptchaVo(img,key);
    }

    @Override
    public String login(LoginVo loginVo) {
        if(!StringUtils.hasText(loginVo.getCaptchaCode()) ){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        String captchaValue = redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if(!StringUtils.hasText(captchaValue) || !captchaValue.equalsIgnoreCase(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }

        SystemUser systemUserFromDB = systemUserService.getOne(new LambdaQueryWrapper<SystemUser>().eq(SystemUser::getUsername, loginVo.getUsername()));
        if(systemUserFromDB==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }

        if(systemUserFromDB.getStatus()== BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        String yourPwd = DigestUtils.md5Hex(loginVo.getPassword());
        if(!yourPwd.equals(systemUserFromDB.getPassword())){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        return JWTUtil.createToken(systemUserFromDB.getId(),systemUserFromDB.getUsername());
    }
}
